Thermometer sheath



FIG. 1 is a left side elevational view of a thermometer sheath showingmy new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom and right rear perspective view thereof;

FIG. 6 is a rear and left-front perspective view thereof, thebroken-line showing of a face and thermometer are environmental only andform no part of the claimed design.

The ornamental design for a thermometer sheath, as shown and described.